Combined jack and signal.



. tamed June 16, 1914:.

YN'GTTLOT A, Fr DIXON. COMBINED JACK AND SIGNAL. APPLICATION FILED MAR. 16, 1909.

Witnesses hue -IIDXXD nURN WWQiNE B E $I Q .T. WEfiTEM :E E B ooiananr ononrqaotp, unners, A o'onronarmn or rumors.

.zooivrsmnnm nsnn stenan annotate.

5p eoifieatian of Letters Betent.

iApplieationfilndidarch 16; 1909. @Seriel No, 483,354.

To all whom it may concern:

Be it known that I, AMos'F. Dixon citizen of,tl1eUnited- States, residing at-Newark, in the county of'EsseX and State of New J ersey, have invented a certain new and useful Improvement in Combined. Jacks and Signals, of which the-following is a full, clear, concise. and exact description.

My invention. relates-to signals for telephone switchboards, more particularly to combined jacks and signals ot-thegeneral type wherein a target-is operated electrically and restored through the action ofthe plug when inserted in the jack.

The object. of my invention is to provide an impro ed signal and signal controlling mechanism.

Prior to my invention telephone signals have been used comprising a pivoted target of a form adapted to protrude through an opening in a front plate, said target'being adapted to display a white surface when operated and a. black surface when restored. Signals comprising" this form of target have proved highly satisfactory for various reasons but more particularly be- ,cause the protruding surface of the target renders the white surface conspicuously Visiblcfroni the side. as well as the front of the switchboard position in which they maybe located.

My invention consists broadly in associating with. a target of the general type mentioned, an electroniagnet adapted to operate the target, a jack, a plug" and a lever adapted to force or restore the target to its normal position when the plug is inserted in the jack.

More specifically my invention provides an unbalanced targetoi the type mentioned preferably a target of approximately spherical form. an elertroinagnct, mechanism for normally retaining said target in its restored position and. for releasing it when said electromagnet is cncr 'ipsed, a jack, a plug. and a hell crank lever for rcstm'ing the target when the plug i=4 inserted in the jack.

My invention may he more readily understood lay reference to the accompanying drawings, in which-- Figure l is a plan View of a con'ibined jack and signal embodying my invention; Fig. 2 is a side elevation: Fig. 3 is a front view as it would appear with the front plate I viewed as in -Fig. 2. and 5 a solid target-may he usedwhich prefremoved; Fig. 4 is a rear view anticFig. 5 is aside View, partly in section, showing the plugin: position" in the jack and illustrating its restoring action. t

-Si1nilar letters of reference I designate similar parts'throughout the difi'erenbfig ares,

Referring toFigs. 1,, 2 and 5., 1 is a plate,

to the 'rear face of which a Ushaped frame 2 is secured in. some suitable manner as by means of screws oassing through said plate and entering tappedholesfi. Within the frame 2- tea centrally pivoted targets, preferablyaof spherical forni adapted toprotrude-tl-irough an aperture in the plate 1. In the drawings a target of approximately sphericalfiorm, protruding through a circuiar opening in said plate is shown. target although symmetrical in form with respect to its axis of rotation, is unbalanced so that in its normal position, gravity tends to halt at In a clockwise -directnon when As shown 1n F128. 1

erahly may he of some light material, as for example, aluminum, the target having; a hole 'or recess filled with some dense substance as lead{adapted tonnhalance it. Secured to t e real; Wall of the frame :2, by means of a screw 6, isaneleetromagnet '7. said also troinag'net being .further supported by an arm 8 extending rear 'ardly from said frame. The armature 9 of the magnet carrier-l an-arm 10 adapted to engage with a pin or catch 11 onthe targets, and normally holdthe said target in its normal position, as shown inFig sL 1 and in which position the surface 12 exposed to View may be black. With this construction the electromagnet when energized operates to disengage the arm 10 from the catch 11 whereupon the target tilts in a clockwise direction to'its opera-nod positirni shown more clearly in Fig. 3, in which position the surface .1? exposed to view may be white. hecured .to the rearwardly extcndirnz: arm 8 are jack springs 13, 14 and 15. lii-toted within the frame 2 is a hell crank lever, pi'e'l ial) ly a Z-shaped lever, having: an arm 17. equipped with an insulating: stud 18 which rests upon one of the jack springs, and a second arm 19 terminatin; in a horizontal portion 20, against which projection 21 on the target may strike when said target is released Joyv the arm 10. Se-

.. atentedal'un .17 ,19

The

. in by a target carrying a pin or catch 1.1

cured to the target is an arm 22 adapted to strike a spring 23 when said target is released and thereby close a night-alarm circuit.

Referring to Fig. 5, 24 is a jack thimble mounted upon the plate 1, and 25 is an ordinary operators plug.

The circuit connections of the electromagnet, jack and night-alarm contact are too well understood by those skilled in the art to require description.

, The operation of my invention isas follows: NVhen a calling party rings, the electromagnet 7 is energized, whereupon the arm 10 is lifted from engagement with catch 11 and the target 4 is allowed to tilt to its operated position, thereby displaying thewhite surface 12 through the aperture in the plate and indicating to the operator that a connection is desired. In the operated position of the target l the arm 22 rests upon the night-alarm contact spring 23, which parts may be so associated with the nightalarm circuit as to complete the same in a manner well understoodby those skilled in the art. In this position pin -2l rests adjacent to the end of the'arm of the Z shaped 'b'ell crank lever. The operator, in answering the call, inserts the plug into the jacks-as shcwn in Fig. 5, whereupon the spring 13 is lifted and the bell crank lever tilted, thereby bringing the end of the portion 20 of said lever in contact with projec tion 21 on the target and forcing said target to its normal or restored position, in which position the white surface of the target is obscured. When the .plug 25 is withdrawn the target, is retained in its normal position by the arm 10, as shown in Figs. land 2.

Although my invention is illustrated herewith which the retaining arm 10 normally engages it will be readily understood that said catch might readily be otherwise associated with the target, and that an arm or projection adapted in any suitable manner to move with the target as, for example, by securing it to the shaft or pivotal part on which'the target is carried, would perform the same function and clearly be within the scope of my i'nvention. Also although the restoring lever is herein shown as having a part'acted upon by the plug through the medium of the jack spring 13, it is obvious that the part .20 might be placed directly in net mounted adjacent said target, an armature for said electrol'nagnet, a catch carried by said target, an arm carried by said armature adapted to engage said catch and normally retain the target, a jack, a plug, 1a1

projection carried by said target, a

crank lever pivoted intermediate said plug I and said target, said lever being adapted to engage said pro ection and restore said target when the plu is inserted in the jack.

2. In an eFectromagnetie annunciator the combination with a frame, of a centrally pivoted approximately spherical target symmetrical in form with respect to its axis of rotation, a projection carried 'by said target, a spring jack a plug, and a pivoted lever intermediate t e path of said plug and said projection", insertlon of said plug within said ack causing said pivoted lever to rotate about its pivot point and engage said projection for restoring target.

3. The combination with a frame, of a solid approximately spherical target pivotally mounted in said frame, said target having a recess, material carried in said recess for unbalancing said target, an electromagnetfor controlling said target, a jack, a plug, and a pivoted leveriintermediate .said plug and said target rotated about its pivot point for restoring said target when said plug is inserted in said jack. I

4. In an electromagnetic annunciator the combination with a frame, of a centrally pivoted approximately spherical target symmetrical in form with respect to its axis of rotation, movedto indicating position 'by force of gravity, a projection carried by said target, a spring jack, a plug, and a ivoted lever intermediate the path of said p ug and said projection for restoring said target to non-indicating position upon the insertion 'of said plug within said jack.

In witness whereof. I hereunto subscribe my name this 15th day of March A. 11,1909.

hMOS F. D xon.

W itnessesr IRVING MAcDoNALv, EDGAR F. Bmonmiv. 

